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Description

FULL DATA SHEET (PDF, 51kB) Download   E-Mail The DS1218 Nonvolatile Controller Chip supplies circuitry required to render standard CMOS RAM nonvolatile. Vcc is monitored using a precise comparator that detects power-fail and inhibits chip-enable holding a write-protect status until power supplies return to nominal levels. The DS1218 switches active power supplies between Vcc and a battery source, whichever is greater. The switch has a voltage drop of less than 0.2V.

Key Features

Controller circuitry with monitoring and logic functions to make CMOS RAM nonvolatile Monitors Vcc and write-protects when out of tolerance Consumes less than 100nA battery current Tests battery condition on power-up Operating range: 0°C to +70°C Voltage/tolerance: 5V ±10% Underwriters Laboratories (UL®) Recognized

Key Specifications:  Non-Volatile RAM Controllers
Part Number	CE Cntrl.	Smart Socket w/Int. Batt.	Li Batt. Monitor	Pwr. Fail Out	RAMs Controlled	Reset Out	VSUPPLY (V)	Package/Pins	Smallest Available Pckg. (mm2)	Price
									max w/pins	See Notes
DS1218	Yes	No	No	No	1	No	5	PDIP(N)/8 SOIC(N)/8	31	$4.88 @1k
See All Non-Volatile RAM Controllers (13)

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1999-11-18
This page last modified: 2009-10-28